rb_uv_to_utf8     104 include/ruby/intern.h int rb_uv_to_utf8(char[6],unsigned long);
rb_uv_to_utf8     896 pack.c         		le = rb_uv_to_utf8(buf, l);
rb_uv_to_utf8    2018 re.c                   len = rb_uv_to_utf8(utf8buf, uv);